(svn r2703) - Feature: [OSX] Added a native alert window to show whatever error() needs to print (Tobin made this, while I fixed some issued in it)

- As a bonus, we now have an objective C file (os/macosx/macos.m) to use the functions Apple made to interact with OS stuff

fileio.c

@@ -165,6 +165,10 @@ void FioOpenFile(int slot, const char *filename)
 			*s = tolower(*s);
 		f = fopen(buf, "rb");
 		}
+
+	if (f == NULL)
+		sprintf(buf, "%s%s", _path.data_dir, filename);	//makes it print the primary datadir path instead of the secundary one
+
 #endif
 	}
 #endif